Dinish Wharf

By gdgadmin
Wednesday, 18th September 2019
Filed under: Events, Projectupdates, News

Dinish Wharf

Ireland’s fishing industry is to gain a new €23.5m, 216m-long quay development on completion of works on Dinish Island, Castletownbere in Co Cork. Working with Keating Construction, we are helping to deliver an additional 216m of landing berth, 0.9 hectares of high capacity reclaimed quay storage area, two new breakwater structures at the entrance to the harbour, the navigation channel dredged  to -6.5mCD and a berthing pocket dredged to -8.0mCD to further facilitate landings by vessels up to 100m length overall.

This project forms part of Ireland’s Operational Programme (OP) and is supported by the European Maritime and Fisheries Fund (EMFF) 2014 – 2020. The Irish OP is aimed at achieving key national development priorities in the agri-food sector, along with “Europe 2020” objectives.  The project is co-funded by the Government of Ireland and the European Union.

Castletownbere Fishery Harbour Centre is one of the six designated Fishery Harbour Centres which are owned, managed and maintained by the Department of Agriculture, Food and the Marine. The last major landing quay development in Castletownbere was completed in 2010. Since then, overall landings into Castletownbere have increased by 60% in volume from 19,030t to 30,522t. The value of landing increased from €29.9m to €99.4m in 2017.

GDG’s Role 

GDG has been working on the delivery of the detailed design for the extension, which comprises of a 168m long suspended quay wall supported on tubular piles connected by a suspended deck which is in turn supported on an inner sheet pile retaining wall. Working closely with the contractor, Keating Construction, we have developed a solution which has enabled the works to be constructed in a safe and efficient manner, resulting in time and cost savings. The tubular piles for the berthing cope beam are currently being installed from a jack-up barge.

The southern section of the wharf comprises of a 48m long berth with three suspended deck spans. The layout has been designed to dissipate wave energy and to minimise wave propagation along the quay wall. Construction is currently at pile installation stage.

The design has included geotechnical interpretation of the soil parameters, development of a construction methodology and sequence and detailed design of all the structural members for the extension. A suite of 2-D and 3-D finite element analysis were undertaken to optimise the design.

The project involves a significant amount of dredging work to increase berthing depths. GDG also advised on an advance sampling strategy for the dredge material to enable testing to run concurrently with dredging operations. Our analysis, which included a sampling program and assessing contaminants, has enabled Keatings to maximise the re-use of dredged material as engineering backfill.